Setting up a touch screen

Hello
I am trying to set up a cheap touch screen monitor so I can run Lcnc without a mouse and keyboard. The touch screen seems to work well. I have installed 'onboard' as a virtual keyboard, which allows me to log in via the touch screen, but once the os is fully loaded it won't let me type into any text box at all.  I am running Debian Bookworm, with a default xfc session and Lcnc is version2.9.8. 
Any help gratefully received.
Thanx